Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758981AbYBIAIt (ORCPT ); Fri, 8 Feb 2008 19:08:49 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753555AbYBIAIl (ORCPT ); Fri, 8 Feb 2008 19:08:41 -0500 Received: from mx3.mail.elte.hu ([157.181.1.138]:35608 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753635AbYBIAIk (ORCPT ); Fri, 8 Feb 2008 19:08:40 -0500 Date: Sat, 9 Feb 2008 01:08:30 +0100 From: Ingo Molnar To: Olof Johansson Cc: linux-kernel@vger.kernel.org, Peter Zijlstra Subject: Re: Scheduler(?) regression from 2.6.22 to 2.6.24 for short-lived threads Message-ID: <20080209000829.GA29986@elte.hu> References: <20080209000456.GA21021@lixom.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080209000456.GA21021@lixom.net> User-Agent: Mutt/1.5.17 (2007-11-01) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 571 Lines: 20 * Olof Johansson wrote: > 2.6.22: 3332 ms > 2.6.23: 4397 ms > 2.6.24: 8953 ms > 2.6.24-git19: 8986 ms if you enable SCHED_DEBUG, and subtract 4 from the value of /proc/sys/kernel/sched_features, does it get any better? if not, does writing 0 into /proc/sys/kernel/sched_features have any impact? Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/